Located between Springfield and Decatur just off of I-72, Illiopolis is know as, "the original center of it all".
The village like most other small towns, has gone through many changes over the years. Several things have kept Illiopolis on the map. We have been the home of the Sangamon Ordnance Plant, Borden Chemical, Formosa Plastics, DeKalb, Monsanto, and many small businesses throughout the years. We have tried to bring you as much of the history of Illiopolis with the pages of this website as possible. We hope that by the time you have looked through all the pages you have a good idea of what Illiopolis is and has been over the years.
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